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Publications associées (27)

The austenite/lath martensite interface in steels: Structure, athermal motion, and in-situ transformation strain revealed by simulation and theory

William Curtin, Francesco Maresca

The austenite/martensite (fcc/bcc) interface is prevalent across many new classes of high-strength steels, and yet both its fundamental structure and its mechanism of motion remain uncertain in spite of decades of research. Here, atomistic simulations are ...

2017

Hot deformation of a Fe-Mn-Al-C steel susceptible of κ-carbide precipitation

Roland Logé

The mechanical properties of Fe-Mn-Al-C steel are significantly enhanced after κ-carbide precipitation via aging; however, most aging treatments are energy demanding because they require relatively high temperatures and extended holding times. This researc ...

Elsevier Science Sa2017

Comment on "Origin of low-temperature shoulder internal friction peak of Snoek-Koster peak in a medium carbon high alloyed steel" by Lu et al. [Solid State Communications 195 (2014) 31]

Daniele Mari

We want to discuss the interpretation of low-temperature shoulder internal friction peak of Snoek-Koster peak (LTS-SK). Lu et al. (2015) [1] attributed it to the interaction between the carbon atoms and twin boundaries in martensite. Nevertheless, the decr ...

Pergamon-Elsevier Science Ltd2016

Évolution microstructurale et propriétés mécaniques d'un alliage Co-Ni-Cr

Raffaele Cosimati

This study concerns the evolution of the thermomechanical properties of new high-performance materials. In particular, we focus on the relationship between the microstructure and the mechanical properties of a superalloy based on Co-Ni-Cr. Superalloys are ...

EPFL2016

New experimental determination of fatigue strength of tubular truss joints in steel grades up to S690

Alain Nussbaumer, Farshid Zamiri Akhlaghi

In this paper research work on welded butt weld connections between hot-rolled seamless tubes and steel castings are presented. Comparison is made between different weld preparations for the butt welds including different steel grades, repair methods, the ...

CRC press2015

Welding simulation of tubular K-joints in steel S690QH

Alain Nussbaumer, Jean-Marie Drezet, Farshid Zamiri Akhlaghi

Residual stress state in planar tubular K-joints, in the chord within the gap region between the two braces, is studied using numerical weld modelling. The motivation comes from past full-scale fatigue tests on tubular trusses made of various steel grades ...

CRC press2015

Measurements and modelling of residual stresses during quenching of thick heat treatable aluminium components in relation to their precipitation state

Nicolas Paul Henry Chobaut

In the fabrication of heat treatable aluminium parts, solutionising and quenching are key steps in order to obtain the required mechanical characteristics. Fast quenching is necessary to avoid coarse precipitation as this one reduces the mechanical propert ...

EPFL2015